Physical and electrochemical evaluation of ATO supported IrO2 catalyst for proton exchange membrane water electrolyser
Physical and electrochemical evaluation of ATO supported IrO2 catalyst for proton exchange membrane water electrolyser
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DOI：
10.1016/j.jpowsour.2014.06.078
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发表时间：
2014-12
影响因子：
9.2
通讯作者：
V. K. Puthiyapura;M. Mamlouk;S. Pasupathi;B. Pollet;K. Scott
中科院分区：
文献类型：
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作者：
V. K. Puthiyapura;M. Mamlouk;S. Pasupathi;B. Pollet;K. Scott
研究了掺锑氧化锡（ATO）作为质子交换膜水电解槽（PEMWE）中IrO 2的支撑材料。采用亚当斯熔融法制备了IrO 2-ATO催化剂。使用X射线衍射（XRD），扫描电子显微镜（SEM），透射电子显微镜（TEM），粉末电导率，循环伏安法（CV）和膜电极组件（MEA）极化的催化剂的物理和电化学特性进行。发现负载型催化剂的BET比表面积和电子电导率主要来自IrO 2。以85%H3PO4为电解质的循环伏安分析表明，负载型催化剂比纯IrO 2具有更高的活性表面积。在80 °C和大气压下使用Nafion®−115膜的MEA性能显示出IrO 2负载量≥60 wt.%时的更好性能在相同条件下，60% IrO 2-ATO的标准化电流密度为1625 mA cm−2@1.8 V，而原始IrO 2的标准化电流密度为1341 mA cm− 2。负载型催化剂的高性能主要归因于活性IrO 2在电化学惰性ATO载体材料上更好的分散，形成更小的IrO 2微晶。A 40重量%通过利用载体材料实现IrO 2的减少。
Antimony doped tin oxide (ATO) was studied as a support material for IrO2in proton exchange membrane water electrolyser (PEMWE). Adams fusion method was used to prepare the IrO2-ATO catalysts. The physical and electrochemical characterisation of the catalysts were carried out using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), powder conductivity, cyclic voltammetry (CV) and membrane electrode assembly (MEA) polarisation. The BET surface area and electronic conductivity of the supported catalysts were found to be predominantly arisen from the IrO2. Supported catalyst showed higher active surface area than the pristine IrO2in CV analysis with 85% H3PO4as electrolyte. The MEA performance using Nafion®−115 membrane at 80 °C and atmospheric pressure showed a better performance for IrO2loading ≥60 wt.% than the pristine IrO2with a normalised current density of 1625 mA cm−2@1.8 V for the 60% IrO2-ATO compared to 1341 mA cm−2for the pristine IrO2under the same condition. The higher performance of the supported catalysts was mainly attributed to better dispersion of active IrO2on electrochemically inactive ATO support material, forming smaller IrO2crystallites. A 40 wt.% reduction in the IrO2was achieved by utilising the support material.